diff --git a/gaboshlib/g_calc.sh b/gaboshlib/g_calc.sh
index 96f1631..a8775fe 100644
--- a/gaboshlib/g_calc.sh
+++ b/gaboshlib/g_calc.sh
@@ -1,34 +1,37 @@
 function g_calc {
 
+
   # Use bc in backround for multiple bc's running much faster
   if [ -z "${g_bc_running}" ]
   then
-    [ -p ${g_tmp}/bc-in ] || mkfifo ${g_tmp}/bc-in
-    [ -p ${g_tmp}/bc-out ] || mkfifo ${g_tmp}/bc-out
-    [ -p ${g_tmp}/bc-sed-in ] || mkfifo ${g_tmp}/bc-sed-in
-    [ -p ${g_tmp}/bc-sed-out ] || mkfifo ${g_tmp}/bc-sed-out
-    
+    g_rnd=$RANDOM
+    mkdir -p ${g_tmp}/${g_rnd}
+    [ -p ${g_tmp}/${g_rnd}/bc-in ] || mkfifo ${g_tmp}/${g_rnd}/bc-in
+    [ -p ${g_tmp}/${g_rnd}/bc-out ] || mkfifo ${g_tmp}/${g_rnd}/bc-out
+    [ -p ${g_tmp}/${g_rnd}/bc-sed-in ] || mkfifo ${g_tmp}/${g_rnd}/bc-sed-in
+    [ -p ${g_tmp}/${g_rnd}/bc-sed-out ] || mkfifo ${g_tmp}/${g_rnd}/bc-sed-out
+
     # bc stream channel
-    bc -ql <${g_tmp}/bc-in >${g_tmp}/bc-out &
-    exec 3>${g_tmp}/bc-in 4<${g_tmp}/bc-out
-    
+    bc -ql <${g_tmp}/${g_rnd}/bc-in >${g_tmp}/${g_rnd}/bc-out &
+    exec 3>${g_tmp}/${g_rnd}/bc-in 4<${g_tmp}/${g_rnd}/bc-out
+
     # sed stream channel
-    sed -su 's/^\./0./; s/^-\./-0./' <${g_tmp}/bc-sed-in >${g_tmp}/bc-sed-out &
-    exec 5>${g_tmp}/bc-sed-in 6<${g_tmp}/bc-sed-out
-    
+    sed -su 's/^\./0./; s/^-\./-0./' <${g_tmp}/${g_rnd}/bc-sed-in >${g_tmp}/${g_rnd}/bc-sed-out &
+    exec 5>${g_tmp}/${g_rnd}/bc-sed-in 6<${g_tmp}/${g_rnd}/bc-sed-out
+
     g_bc_running="true"
   fi 2>/dev/null
-  
+
   # do bc
   echo "scale=8; $@" >&3
   local g_bc_out
   read g_bc_out <&4
-  
+
   # do sed
   echo ${g_bc_out} >&5
   local g_sed_out
   read g_sed_out <&6
-  
+
   # echo result
   echo ${g_sed_out}
 }